package com.yebxxx.server.controller;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.OutputStream;

/**
 * 验证码
 */
@RestController
public class CaptchaController {
    @Autowired
    private DefaultKaptcha defaultKaptcha;
    @ApiOperation(value = "验证码")
    @GetMapping(value = "/captcha",produces = "image/jpeg")
    public  void captcha(HttpServletRequest request, HttpServletResponse response){
        //定义输出类型为image/jpeg
        response.setDateHeader("Expires",0);
        response.setHeader("Cache-Control","no-store,no-cache,must-revalidate");
        response.addHeader("Cache-Control","post-check=0,pre-check=0");
        response.setHeader("Pragma","no-cache");
        response.setContentType("image/jpeg");
        //---------------生成验证码begin----------------------------------
        //获取验证码内容
        String text = defaultKaptcha.createText();
        System.out.println("验证码内容"+text);
        request.getSession().setAttribute("captcha",text);
        //根据文本获得验证码
        BufferedImage image = defaultKaptcha.createImage(text);
        ServletOutputStream servletOutputStream=null;
        try{
            servletOutputStream = response.getOutputStream();
            //输出流输出图片 格式为jpg
            ImageIO.write(image,"jpg", servletOutputStream);
            servletOutputStream.flush();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(null!=servletOutputStream){
                try{
                    servletOutputStream.close();
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }



        //---------------生成验证码end------------------------------------

    }
}
